Hi @boriskamp1991
Could you please debug all of the possible fields and variables? This page should give you more idea about it: https://www.advancedcustomfields.com/resources/debug/. Also, could you please try to use the get_field() function one by one between the kitNumber, manufacturer_name, and the kitName fields? That way we will know which is the code at fault.
Thanks 🙂
